434 MOLLUSCA. DONACIDiE. Gapsa. 
Tellina variegata, List. Conch, t. ccclxxxiv.-— D. comp. Mont Test. Brit. 
106. Twrt Biv. Brit. 125 — English shores, rare. 
Length three-quarters of an inch, breadth an inch and a half; glossy, va- 
riegated, with a white band from the beak towards the anal angle ; a few ob- 
solete concentric furrows, the inside purple ; retral extremity more produced 
than in either of the preceding species. 
475. D. pleheia . — Triangularly ovate, smooth, with two lon- 
gitudinal fulvous bands. 
Tellina parva, List Conch, t. ccclxxxix. Pult Dorset. 32. Mont Test. 
Brit. 107. t. V. f, 2. Turt. Biv. Brit. 126.— English and Scottish 
shores, rare. 
Length half inch an inch, breadth three-quarters ; broad, thick and strong; 
yellowish ; the teeth large ; the fulvous bands are sometimes absent. 
476 . D. ruhra. — Wedge-shaped, smooth, uniformly red. 
Mont Test, Brit. Sup. 38. Turt Biv. Brit. 129. t, x. f. 14 Southern 
shores of England, rare. 
About an eighth of an inch in diameter, semitransparent ; inside reddish ; 
beaks prominent. 
Gen. CXX. CAPSA. — Shell transverse, abbreviated an- 
teally ; hinge with two teeth in both valves ; no lateral 
teeth. 
477 . C. castanea — Strong, transversely oblong, with a few 
obsolete concentric ridges. 
Donax cast. Mont Test. Brit. 573. t. xvii. f. 2 — Capsa cast. Turt Biv. 
Brit. 128. t. X. f. 13 — Southern shores of England, rare. . 
Length a quarter, and breadth half an inch ; chesnut, with a deeper co- 
loured curved band from the hinge towards the longest side ; inside chesnut, 
margin plain ; one of the teeth large, the other small, in each valve. 
Gen. CXXI. TELLINA. — Shell transverse or suborbicu- 
lar, with a flexuous plait at the posterior side ; hinge with 
two teeth in one or both valves ; lateral ones generally re- 
mote. 
With two teeth in one valve^ and the shell oval. 
478. Jragilis . — Transversely ovate, subsulcated by the 
layers of growth ; retrally truncated. 
Penn. Brit. Zool. iv. 86. t. xlvii. f. 26 — English shores. 
Length nine-tenths, breadth one inch and three-tenths ; white ; the left 
valve largest ; the striae wrinkled behind the fold ; indistinct longitudinal 
striae, and some minute oblique ones, apparently confined to the cuticle ; in- 
side striated nejar the margin at which the shell is slightly bevelled ; an in- 
distinct ridge from the beak to the posterior muscular impression ; no lateral 
teeth. The specimens in my possession which agree with the figure in 
“ British Zoology,” have the teeth indistinct. 
